Car-heating system.



J. M. COLEMAN.

CAR HEATING SYSTEM.

APPLICATION FILED ocT.6. I914.

Patented July 6, 1915.

M/fleases Wren/ ow I I d/ZCa/ema COLUMBIA PLANOURAPH (70 WASHIN IIIIIII c.

JAMES M. COLEMAN, 0F MONTREAL, QUEBEC, CANADA.

CAR-HEATING- SYSTEM.

Specification of Letters Patent.

Patented July 6, 1915..

Application filed October 6, 1914. Serial No. 865,309.

To all whom it may concern Be it known that 1, JAMES M. COLEMAN, a subject of the King of Great Britain, residing at the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Car- Heating Systems, of which the following is a full, clear, and exact description.

This invention relates to improvements in car heating systems, and the object is to provide means for obtaining a maximum of heat from the heating agent used.

A further object is to provide means for conserving the heating agent and reducing the amount required to maintain the car at a given temperature.

A further object is to provide means for individually heating the various compartments of a car.

This invention relates particularly to that class of heating system in which two coils are used arranged one within the other, the inner coil being supplied with steam from the train pipe and heating the water in the annular space between the inner and outer coils. A system of this character usually operates in connection with a stove which may be used in emergency when no steam is available to heat the water. The steam after passing through the inner pipe, instead of being discharged and lost is turned through an additional coil, in which it condenses and thus yields its latent heat. A goose neck trap is provided which operates automatically to discharge only the cold water, the hot water of condensation remaining in the coil. A direct connection is also provided between the train pipe and these condensed steam coils by means of which steam may be admitted directly to the coils to give additional heat to the compartments of a car or a small amount of heat in chilly weather when the full heating system is not in operation.

In the drawings which illustrate the invention:Figure 1 is a diagrammatic View of a sleeping car heating system. Fig. 2 is a side elevation of the goose neck trap.

Referring more particularly to the drawings, 5 designates a body of a sleeping, drawing room or compartment car having at one end drawing rooms 6 and ladies dressing room 7, and lavatory 8, and at the other end mens dressing room 9 and lavatory 10. At one end of the car, a stove 11 is provided within which are two double coils (not shown) one for each side of the car and connected with the car heating coils 12 and 13, which are provided with loops or otherwise formed portions 14: extending into the various compartments. Steam is taken from the train line pipe 16 and delivered to the inner coils through branch pipes 17 controlled by valves 18. The steam circulates through the inner coils and heats the film of water between the inner and outer coils, which circulates through and warms the entire car. The steam is delivered into the top of the system and as it becomes heavier with cooling, falls to the bottom and is drawn out through the pipes 19.

The system thus far described is that in general use, and has the great defect that the temperature in one portion of the car cannot be regulated without regulating the whole car, so that in a sleeping car if the body is cooled off to proper temperature for sleeping, the dressing rooms and drawing rooms are too cool for comfort, and vice versa. Furthermore, after the system is once heated up, the steam does not become condensed and is discharged in vapor form, thus throwing away a great deal of readily obtainable heat and drawing very heavily on the steaming powers and water supply of the engine. According .to the present invention, the steam from the inner coil, in place of being discharged, is passed through auxiliary pipes 20 having coils 21 connected thereto and located in the dressing and drawing rooms. At the opposite end of each coil from the pipe 20, a goose neck trap 22 shown in Fig. 2 is provided. The steam condenses into water in the pipe 20 and coils 21, and thus gives up its latent heat, which as is well known is greater than that of highly superheated steam. In this way, the heating system may be run at comparatively low temperature, maintaining the body of the car cool and the dressing rooms and drawing rooms comfortably warm. The desired heating effect is obtained with much less expenditure of steam than heretofore, and consequently less loss of water and less draft on the engine. Furthermore, the condensed steam pipes 19 are direct connected with the train line steam pipe "by pipes 23, having valves 24 therein, so that if required, steam direct from the train pipe may be turned into these auxiliary coils, and at the same time prevented from entering the general heating system by closing the valves 25 at the discharging ends of the inner coils. Each of the coils 21 is provided with an individual control valve 26, so that either the condensed steam or the dry steam from the trainpipe may be cut off from any or all of the coils if required. This arrangement enables the drawing rooms or dressing rooms to be slightly warmed in cool weather when the general heating system is not required. Thus in cool weather, the dressing rooms may be warmed to a comfortable tempera ture morning and evening without heating the body of the car, or the occupant of a drawing room may control the temperature to his own comfort without inflicting dis-.

comfort upon passengers in the body of the car or adjacent drawing rooms.

The operation of the goose neck trap it is thought is well understood. When the steam condenses into water and cools, the water accumulates ahead of the steam and gradually rises in the rising leg 27 of the trap. As soon as the water reaches the crown 28 of the trap, it will drip or possibly siphon through the falling leg 29. It will thus be seen that additional heating surface is provided sothat the car may be better heated in extreme cold weather with the amount of steam now used and in ordinary weather with a much less amount of steam. The auxiliary coils may be used in the body of the car and in the compartments independently of one another, as desired. In addition, anyyof the compartments or the body of the car may be slightly heated in cool weather by admitting a small amount of steam from the train line direct to the supplementary coils.

Having thus described my invention, what I claim is 1. The combination with a car heating system comprising an inner steam coil and an outer water coil, of a continuation of the steam coil beyond the water coil forming a condenser, coils connected to said condenser parallel with portions of the water coil, a control valve for each of said last mentioned coils, an automatic trap for each of said last mentioned coils arranged to discharge cold water, means for delivering live steam into said condenser, and valves excluding said live steam from the steam coil within the water coil.

2. The combination with a car heating system, comprising a train line steam pipe, steam coils supplied from said train line pipe, water coils surrounding said steam coils, an extension of the steam coils beyond the water coils arranged parallel with portions of the water coils, automatic traps arranged to discharge cold water from said extension steam coils, a direct communication between the train line steam pipe and said extensions of the steam coils, valves controlling steam flow from the train line pipe to said coil extensions, and valves excluding steam from the train line pipe from the portions of said steam coils within the water coils.

3. The combination with a car heating system, comprising an inner steam coil and an outer water coil, of a sectional surface condenser connected to the discharge end of the steam coil, the sections of said condenser being arranged in various parts of the car, means for throwing said condenser sections independently into and out of operation, an automatic trap arranged to discharge water from each condenser section independently, and means for admitting live steam direct to said condenser during inoperative condition of the heating system.

In witness whereof, I have hereunto set my hand, in the presence of two witnesses.

JAMES M. COLEMAN.

lVitnesses:

S. R. W. ALLEN, G. M. MORELAND.

(lopies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents.

- Washington, D. C. 

